According to the textbook, Encryption is the process of converting readable data into unreadable characters by applying a formula that uses a code, called an encryption key. There is more than once that the documents I downloaded from Internet or received from friends turn into meaningless symbols. Whenever I encounter this situation, I alway doubt that document itself carries virus. So now I realize what really happened- the sender and my computer didn't use the same encryption software or illegally downloaded protected documents.
Parental Controls are totally new to me. I didn't know Windows operating system itself carries such useful tool. So later on I can turn on the parental controls in Windows to set up the time limits, games and the specific program limits on my classroom computer. I also think it's necessary to teach parents or guardians to use these tools by emails to supervising their kids at home.
Honestly speaking, China is notorious for not respecting copyright or breaking copyright law. When I was in university, I remembered that we could copy the whole textbook or essay without no hesitation. In my mind, there was nobody who taught us what the copyright is or why we should protect the copyright. Everyone took copying as each other's generous sharing subconsciously. Time changes. Nowadays, more and more Chinese realize the great importance of protecting copyright. When I came to US, I was very cautious about copying stuff from other's work. According to the Fair Use law, as a teacher, we seem like having the freedom of using a copyrighted work with non-profit educational purpose, but actually I always feel confused. Am I breaking the copyright law if I share the scanned textbook file ( downloadable )with my students in the Edmodo? Some teachers say it's okay; others are not. I believe that I should research more and know more about fair use in our school district.
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